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Arduino sketch for burning new bootloaders
This project forked from westfw/optiloader
Arduino sketch for burning new bootloaders
optiLoader.pde Copyright (c) 2011 by Bill Westfield ("WestfW") Distributed under the terms of the "MIT OSSW License." Optiloader is a sketch designed for bulk upgrading of Arduino board bootloaders using another Arduino as a device programmer. It stores multiple copies of the optiboot bootloader in program flash memory. When run (ie by hitting reset), it probes the target device, figures out the type of CPU (ATmega8, ATmega168, ATmega328, ATmega328P) and initiates upload of the bootloader and appropriate fuse programming. Since optiLoader runs entirely with the Arduino and there is no communications with a host PC required, this can procede very rapidly, and is not subject to interference of (for example) avrdude with auto-reset. The internal copies of the bootloader are prepare manually from the .hex files compiled in the bootloader directories. (There's an easy editor macro process, but it is manual.) While communication with a host PC is not required, the sketch does send status information to the serial port at 19200bps. Here's a sample: OptiLoader Bootstrap programmer. 2011 by Bill Westfield (WestfW) Target power on! ... Starting Program Mode [OK] Reading signature:950F Searching for image... Found "optiboot_atmega328.hex" for atmega328P Start address at 7E00 Total bytes read: 502 Setting fuses for programming Lock: 3F FFE000 Low: FF FFA000 High: DE FFA800 Ext: 5 FFA400 Programming bootloader: 512 bytes at 0x3F00 Commit Page: 3F00:3F00 Commit Page: 3F40:3F40 Commit Page: 3F80:3F80 Commit Page: 3FC0:3FC0 Restoring normal fuses Lock: 2F FFE000 Target power OFF! Type 'G' or hit RESET for next chip
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